/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2014 University of Manchester
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package uk.ac.manchester.cs.mekon.gui;

import java.util.*;

import uk.ac.manchester.cs.mekon.model.*;

/**
 * @author Colin Puleston
 */
class CFrameSelectionSynchroniser {

	private List<ComponentSynchroniser> synchronisers = new ArrayList<ComponentSynchroniser>();
	private boolean synchronising = false;

	private class ComponentSynchroniser extends CFrameSelectionListener {

		private CFrameSelectionRelay relay;

		protected void onSelected(CFrame frame) {

			if (!synchronising) {

				synchronising = true;
				synchronise(frame);
				synchronising = false;
			}
		}

		ComponentSynchroniser(CFrameSelectionRelay relay) {

			this.relay = relay;

			synchronisers.add(this);
			relay.addUpdateListener(this);
		}

		private void synchronise(CFrame selection) {

			for (ComponentSynchroniser synchroniser : synchronisers) {

				if (synchroniser != this) {

					synchroniser.relay.update(selection);
				}
			}
		}
	}

	void add(CFrameSelectionRelay relay) {

		new ComponentSynchroniser(relay);
	}
}